Improvement in kilns for the manufacture of artificial stone



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Improvementin Kilns fot the Manufacture of Artificial Stone. N0.120,834. 'qz-i Patented Nov-14,1871.

, DANIEL M. SPROGLE. Improvement in Kilns for the Manufacture ofArtificial Stone.

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No. 120,834, i296 patentemovl 14,1871.

If T V l7 I a 3271 FJ I .H 7* V V I V k fl V 2 I a? e v I L [J I Ft? I"r Z; 41w MQ Q DANIEL M. SPROGLE, OF ANNAPOLIS, MARYLAND.

IMPROVEMENT IN KILNS FOR THE MANUFACTURE OF ARTIFICIAL STONE.

, Specification forming part of Letters PatentNo. 120,834, datedNovember 14, 1871.

To all whom it may concern:

Be it known that I, DANIEL M. SrRoeLn, of Annapolis, in the county ofAnne Arundel and State of Maryland, have invented a new and ImprovedKiln to be used in the Manufacture of .Artificial Stone; and I do herebydeclare that acid gas-generator which is used in combination therewith.Fig. 2, Plate 1, is a section, taken vertically and transversely throughthe improved kiln and through the generator. Fig. 3, Plate 2, is asection, taken longitudinally and vertically through the center of thekiln. Fig. 4, Plate 2, is a top View of the kiln with the cover andcapping timbers removed.

Similar letters of reference indicate corresponding parts'in the severalfigures.

This invention relates to an improved portable kiln which is designedfor containing cementmolds to be treated to the action of carbonic acidand steam, in the manufacture or curing of artificial stone.

In an application for Letters Patent, marked case A, and bearing evendate With the filing of this, I have described, in connection with mykiln, a generator for the'production of carbonicacid gas and steam. I donot claim this genera tor under this application, but confine myself tol the kiln, which I will now proceed to describe.

In the accompanying drawing, 1) represents a kiln, which is made of arectangular form, of suitable capacity,'and Which is so constructed thatit can be readily taken down and erected again. The object of soconstructing the kiln is that the molded articles, while in a greenstate, may be arranged in a pile without the necessity of lifting themover the top of the kiln, which would be very liable to render themuntrue, especially long tubular work. I therefore construct a kiln whichcan be readily built up about the material after it is piled up. Thekiln is composed of sills a b and a flooring, I), which latter arefitted into grooves formed into the sill-timbers, as shown in Figs. 2and 3. The sill-timbers are also grooved for receiving the side and endhousin gs C- O which are composed of boards of suitable widths rabbetedtogether so as to make close joints, as shown in the drawing. The sideand end timbers, and also the top of the kiln, are sustained by means ofuprights e which are mortised into the sill-timbers a b and also intothe capping-timbers a b. The cappingtimbers are halved and lapped attheir joints and locked together thereat by means of the tenons on thecorner uprights e, and these capping-timbers are grooved on their bottomsides for receiving the upper ends of the side and end housings G G, andon their inner edges for receiving the covering-boards A, as shown inFigs. 2 and 3. The side and end housings and the covering-boards aremade up of sections, jointed together by rabbets, and strengthened bymeans of inside battens. It will be seen from the above description thatthe several parts composing the kiln are so constructed and unitedtogether that by removing the cover and capping-timbers the structurecan be readily taken down. It can be erected with the same facility.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, 1s-' The portable sectional kiln, constructedsubstantially in the manner and for the purpose set forth.

DANIEL M. SPROGLE. CAMPBELL,

J. N R. T. CAMPBELL. (153)

